Turbine pump unit



Juiy 11, 1961 w. K. JEKAT 3 :Sheens-Sheet 1 Filed Nov. 27, 1959 FIG-.1

WA U'ER K. JEK

July 11, 1961 w. K. JEKAT 2,991,722

TURBINE PUMP UNIT Filed Nov. 27, 1959 5 Sheets-Sheet 2 28 29 lo 2 &

\9 38 T mr WALTER K TEKAT INVENTOR.

July 11, 1961 w. K. JEKAT TURBINE PUMP UNIT Filed Nov. 27, 1959 3Sheets-Sheet 3 WALTER K. IEKAT INVENTOR.

State Ute This invention relates to turbine-pump units and moreparticularly provides an embodiment wherein the rotating and sealingportions are readily accessible for inspection, and replacement shouldsame be necessary.

It is desirable that pipes leading to turbine-pump units need not beloosened when inspection or repair of the rotating and sealing portionsis necessary.

While erection as above discussed has the advantage in maintaining fluidtight sealing at the connecting junctions there are disadvantages inthat disassembly becomes a burden and the cost of providing a unit topermit permanent connection to the inlet and outlet pipes and yetprovide access to the rotating portions, is excessive. By way ofexample, turbine-pump casings are split horizontally, one portion beingpermanently fixed to the inlet and outlet pipes, the other removablyconnected to the former to provide for access to the rotating andsealing portions. A unit such as above described has the disadvantagesin that the weight and work of manufacturing are augmented because ofthe flanges which extend around the machine. Furthermore, the operatingeffectiveness of the unit is affected because of the large andcomplicated faces between the flanges. These faces require carefulattention if they are to provide a fluid tight seal.

Furthermore, these prior type turbine-pump units are usually formed inindependent casings wherein the rotating portions are mounted on thesame shaft. Complex sealing means, further adding to the cost ofmanufacture, are provided between the pump and turbine as is shown inPatent 2,495,525.

The above enumerated disadvantages would certainly be avoided bydisposing both the impeller and rotor in a common casing which isdivided circumferentially instead of horizontally. Circumferentiallydividing either the pump casing or turbine casing has been tried in thepast (none of those prior art systems teaching inclusion of the impellerand rotor in a common casing as contemplated herein) and this had thedisadvantage that the rotor or impeller is accessible only after thediflicult and complex job of completely dismantling the machine.

In contradistinction, the present invention teaches the dividing of theturbine-pump unit circumferentially in such fashion as to provide foreasy access to the rotor, impeller and other portions of the unit and inaddition reduces overall weight and thusly cost of manufacture byincorporating the pump and turbine in a common casing.

While a typical installation for the improved turbinepump unit can befound in a steam power plant cycle wherein the turbine serves primarilyas the power producer transmitting useful power to the shaft andcoupling at one end and driving the boiler feed pump at the other endthe primary application of the unit described herein would be in aninstallation where fluids of large molecular weight such as expensivefluorinated hydrocarbons act as the working fluid. In such aninstallation loss of the costly fluid by leakage is kept to a minimumbecause any leakage from the pump would pass into the turbine and wouldtherefore not be lost from the cycle.

It is apparent then that the number of seals needed to prevent loss ofworking fluid is kept to a minimum and that construction as hereinafterdescribed not only provides a turbine-pump unit which is simple inconstruction and low in cost but one that will efiiciently handle fluidsof large molecular weight.

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It will be evident to one skilled in the art that the turbine-pump unitcontemplated herein can be readily converted to multi-stage operationwithout departing from the scope of the invention described herein. 7

Accordingly, it is an object of this invention to provide an improvedturbine-pump unit embodying the above described features.

In the drawings:

FIGURE 1 is an end view of the turbine-pump unit showing the end of thecasing to be rigidly connected to piping associated with the unit.

FIGURE 2 is a longitudinal section showing the turbine-pump unitcontemplated herein and taken on line 1-1 of FIGURE 1.

FIGURE 3 is an exploded view of the turbine-pump unit.

Referring more particularly to the drawings, FIGURES l and 3 show thecontemplated unit as comprising a turbine pump casing, generallydesignated 1, divided circumferentially into independent portions 2, 3and 4 to provide for rapid disassembly thereof in the event that therotating portions of the like are in need of repair. Furthermore,portion 2 comprising the main casing of turbine pump casing 1 can befixedly connected at the inlet openings 6, 7 and 8 of the turbine unit9, and at the inlet opening 10 of the pump unit 11 and their respectiveoutlet openings 12 and 13 to the piping of the system. Provision forrigid connection of the portion 2 to the piping of the system with whichthe turbine-pump unit is associated coupled with provisions which permitrapid disassembly of the portions 3, and 4 of the casing permit fluidtight sealing at the pipe joints to limit loss of system fluid byleakage and in addition easy access to the rotating portions of theunit.

To reduce the manufacturing costs and provide a unit which is readilyrepaired applicant divides the turbine pump casing 1 into a first andsecond compartment 14 and 15 by a partition 16 which is shown as anozzle for directing working fluid to the rotor 17 of the turbine andthe partition at the same time maintaining a fluid tight relationbetween the first and second compartments.

The rotor 17 as shown in FIGURE 2 is disposed in working relation withthe nozzle formed on partition 16 and is mounted on shaft 18 and fixedthereto by hub 19 which extends into the first compartment 14 throughopening 20 formed in partition 16. Seals 21 of any well known type andreadily purchased on the open market are mounted on hub 19 to maintainthe fluid tight seal between the compartments.

Shaft 18 is journaled in bearing members 22 and 23 which are mounted inbearing housing 24 formed in the portion of the casing designated 4.

Stop members 26 and 27 formed in bearing housing 24 and end cover 28coact to maintain the shaft 18 journaled in the bearings and in additionprovide the usual stability desired.

Seal means 29 are connected to casing portion 4 and mounted on shaft 18at the portion thereof extending into the turbine unit 9. The seal means29 functioning to prevent leakage from compartment 15 through opening 30in casing portion 4 to maintain the required and desired fluid tightrelationship.

As is clearly shown in FIGURE 2 of the drawings the end portion 31 ofshaft 18 extends into the first compartment 14 in overhanging relation.

The impeller 32 of the pump is fixed thereto and is driven by a portionof the energy created in the turbine to pass fluid from. inlet 10 to theoutlet 13. The turbine being driven as is usual by fluid enteringthrough inlets 6, 7 and 8 formed in the end portion of easing 2 and aswas mentioned above the greater source of power is transmitted to end 5of the shaft 18. The usual admis sion valve 33 is associated with eachof the inlets to provide for the required control of turbine-pumpoperation.

Provisions taking the form of a pump compartment 34 and a turbineworking fluid compartment 35 adapt the end portion 2 of the casing toaccommodate both the pump unit and the passageways for passing Workingfluid to the nozzle on partition 16.

More specifically the annular extension 36 is fashioned to abutpartition 16 to provide the above mentioned pump and turbine Workingfluid compartment. A seal member 37 is disposed therein to maintain therequired fluid tight relationship.

' In assembly, impeller 32 is mounted on the overhung shaft as bythreaded means 38 and adjacent the partition 16. The rotor 17 is alsomounted adjacent the partition 16, however, on the other side thereof.Portions 3 and 4 of the casing forming a cover or closure are thenmounted about the partition 16 and connected to the main casing 2 as isclearly shown in the drawings. The foregoing elements maintained in theabove indicated relationship by a plurality of bolts 39. The bearinghousing can then be placed in the opening formed in casing portion 4 toform an operating embodiment which is then rigidly connected to thepiping of the system.

While the invention has been described in detail with reference to aspecific structure, it is to be understood that the concept of thisinvention is not limited to those details, but is limited only by thescope of the appended claims.

What is claimed is:

1. In a turbine pump unit, a turbine pump casing comprising a maincasing including a partition connected at one end thereof and a closuremounted about the partition and connected to said main casing, one sideof said partition and said main casing coacting to form a pumpingchamber, the other side of said partition and said closure coacting toform a driving compartment, bearing means disposed on said closure, ashaft in said bearing means and extending into the driving compartmentthrough said partition and into said pumping chamber, pumping means inthe pumping chamber and connected to said shaft, a rotor in the drivingcompartment and connected to said shaft, first inlet and outlet means onthe main casing and in communication with the pumping chamber, secondinlet and outlet means on the main casing in communication with thedriving compartment, and nozzle means on said partition and spacedrelative the inlet to said driving compartment to direct motive fluidpassing from said inlet to said rotor to cause same to move said pumpingmeans to flow fluid from the inlet means to the outlet means of saidpumping chamber.

2. In a turbine pump unit, a turbine pump casing comprising a maincasing including a partition connected at one end thereof and a closuremounted about the partition and connected to said main casing, one sideof said partition and said main casing coacting to form a pumpingchamber, the other side of said partition and said closure coacting toform a driving compartment, bearing means disposed on said closure, ashaft in said bearing means and extending into the driving compartmentthrough said partition and into said pumping chamber, and said shaft inoverhanging relation with both said pumping chamber and drivingcompartment, pumping means in the pumping chamber and connected to saidshaft, a rotor in the driving compartment and connected to said shaft,first inlet and outlet means on the main casing and in communicationwith the pumping chamher, second inlet and outlet means on the maincasing in communication with the driving compartment, and nozzle meanson said partition and spaced relative the inlet to said drivingcompartment to direct motive fluid passing from said inlet to said rotorto cause same to move said pumping means to flow fluid from the inletmeans to the outlet means of said pumping chamber.

3. In a turbine pump unit, a turbine pump casing comprising a maincasing including a partition connected at 4 one end thereof and aclosure mounted about the partition and connected to said main casing,one side of said partition and said main casing coacting to form apumping chamber, the other side of said partition and said closurecoacting to form a driving compartment, bearing means disposed on saidclosure, a shaft in said bearing means and extending into the drivingcompartment through said partition and into said pumping chamber, andsaid shaft in overhanging relation with both said pumping chamber anddriving compartment, seal means about the portion of said shaftextending through said partition to maintain a fluid tight relationshipbetween the pumping chamber and driving compartment, pumping means inthe pumping chamber and connected to said shaft, a rotor in the drivingcompartment and connected to said shaft, first inlet and outlet means onthe main casing and in communication with the pumping chamber, secondinlet and outlet means on the main casing in communication with thedriving compartment, and nozzle means on said partition and spacedrelative the inlet to said driving compartment to direct motive fluidpassing from said inlet to said rotor to cause same to move said pumpingmeans to flow fluid from the inlet means to the outlet means of saidpumping chamher.

4. In a turbine pump unit, a turbine pump casing comprising a maincasing including a partition connected at one end thereof and a closuremounted about the partition and connected to said main casing, one sideof said partition and said main casing coacting to form a pumpingchamber, the other side of said partition and said closure coacting toform a driving compartment, bearing means disposed on said closure, ashaft in said bearing means and extending into the driving compartmentthrough said partition and into said pumping chamber, and said shaft inoverhanging relation with both said pumping chamber and drivingcompartment, a pumping means in said pumping chamber and connected tosaid shaft and said pumping means adjacent one side of said partition, arotor in the driving compartment and connected to said shaft and saidrotor adjacent the other side of said partition, first inlet and outletmeans on the main casing and in communication with the pumping chamber,second inlet and outlet means on the main casing in communication withthe driving compartment, and nozzle means on said partition and spacedrelative the inlet to said driving com partment to direct motive fluidpassing from said inlet to said rotor to cause same to move said pumpingmeans to flow fluid from the inlet means to the outlet means of saidpumping chamber.

5. The combination claimed in claim 4 wherein the closure comprises aring-like portion disposed about the partition and a portion closing thepartition and connected to the main casing.

6. In a turbine pump unit, a turbine pump casing com prising a maincasing including a partition connected at one end thereof and a closuremounted about the partition and connected to said main casing, one sideof said partition and said main casing coacting to form a pumpingchamber, the other side of said partition and said closure coacting toform a driving compartment, a bearing housing detachably connected tosaid closure, bearing means in said bear-ing housing, a shaft in saidbearing means and extending into the driving compartment through saidpartition and into said pumping chamber, and said shaft in overhangingrelation with both said pumping chamber and driving compartment, sealmeans about the portion of said shaft extending through said partitionto maintain a fluid tight relationship between the pump-ing chamber anddriving compartment, pumping means in said pumping chamber and connectedto said shaft and said pumping means adjacent one side of saidpartition, a rotor in the driving compartment and connected to saidshaft and said rotor adjacent the other side of said partition, firstinlet and outlet means on the main casing and in communication with thepumping chamber, second inlet and outlet means on the main casing incommunication with the driving compartment, nozzle means on saidpartition and spaced relative the inlet to said driving compartment todirect motive fluid passing from said 5 inlet to said rotor to causesame to move said pumping means to flow fluid from the inlet means tothe outlet means of the pumping chamber, and said pumping means,partition, rotor, shaft, and bearing housing detachable from the maincasing to permit easy repair and replace- 0 ment of same.

References Cited in the file of this patent UNITED STATES PATENTS BuchiAug. 23,

Doelter Nov. 2,

Buchi et a1. Sept. 10,

Davies et a1. Dec. 3,

FOREIGN PATENTS Germany Nov. 29,

France Mar. 13,

